Answer:
w(4 - 11w)
Step-by-step explanation:
<span>since sin and cos = each other at pi/4; take your integrals from 0 to pi/4
</span><span>[S] cos(t) dt - [S] sin(t) dt ;[0,pi/4]
</span>
<span>to revolve it around the x axis;
we do a sum of areas
[S] 2pi [f(x)]^2 dx
</span>
<span>take the cos first and subtract out the sin next; like cutting a hole out of a donuts.
</span><span>pi [S] cos(x)^2 dx - [S] sin(x)^2 dx ; [0,pi/4]
</span>
<span>cos(2t) = 2cos^2 - 1
cos^2 = (1+cos(2t))/2
</span>
<span>1/sqrt(2) - (-1/sqrt(2) +1)
1/sqrt(2) + 1/sqrt(2) -1
(2sqrt(2) - sqrt(2))/sqrt(2) = sqrt(2)/sqrt(2) = 1</span>
Answer:
b
Step-by-step explanation:
Answer:
3
22
0
Step-by-step explanation:
I'm pretty sure it is the answer but if it isn't then sorry
Answer:
The number of phone numbers Abby has stored in her cell phone, n = 61 - 25 = 36
Step-by-step explanation:
Megan has 25 phone numbers stored in her cell phone. Abby has some phone numbers stored in her cell phone.Together they have a total of 61 phone numbers stored.
Given that n= the number of phone numbers Abby has stored in her cell phone.
We have combined contacts = 61
25 + n = 61
n = 61 - 25 = 36
The number of phone numbers Abby has stored in her cell phone, n = 61 - 25 = 36
